106 lines
4.1 KiB
JavaScript
106 lines
4.1 KiB
JavaScript
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/*
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* Placeholder plugin for jQuery
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* ---
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* Copyright 2010, Daniel Stocks (http://webcloud.se)
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* Released under the MIT, BSD, and GPL Licenses.
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*/
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(function($) {
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function Placeholder(input) {
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this.input = input;
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if (input.attr('type') == 'password') {
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this.handlePassword();
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}
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// Prevent placeholder values from submitting
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$(input[0].form).submit(function() {
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if (input.hasClass('placeholder') && input[0].value == input.attr('placeholder')) {
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input[0].value = '';
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}
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});
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}
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Placeholder.prototype = {
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show : function(loading) {
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// FF and IE saves values when you refresh the page. If the user refreshes the page with
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// the placeholders showing they will be the default values and the input fields won't be empty.
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if (this.input[0].value === '' || (loading && this.valueIsPlaceholder())) {
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if (this.isPassword) {
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try {
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this.input[0].setAttribute('type', 'text');
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} catch (e) {
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this.input.before(this.fakePassword.show()).hide();
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}
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}
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this.input.addClass('placeholder');
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this.input[0].value = this.input.attr('placeholder');
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}
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},
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hide : function() {
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if (this.valueIsPlaceholder() && this.input.hasClass('placeholder')) {
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this.input.removeClass('placeholder');
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this.input[0].value = '';
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if (this.isPassword) {
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try {
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this.input[0].setAttribute('type', 'password');
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} catch (e) { }
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// Restore focus for Opera and IE
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this.input.show();
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this.input[0].focus();
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}
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}
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},
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valueIsPlaceholder : function() {
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return this.input[0].value == this.input.attr('placeholder');
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},
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handlePassword: function() {
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var input = this.input;
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input.attr('realType', 'password');
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this.isPassword = true;
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// IE < 9 doesn't allow changing the type of password inputs
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if ($.browser.msie && input[0].outerHTML) {
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var fakeHTML = $(input[0].outerHTML.replace(/type=(['"])?password\1/gi, 'type=$1text$1'));
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this.fakePassword = fakeHTML.val(input.attr('placeholder')).addClass('placeholder').focus(function() {
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input.trigger('focus');
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$(this).hide();
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});
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$(input[0].form).submit(function() {
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fakeHTML.remove();
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input.show()
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});
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}
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}
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};
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var NATIVE_SUPPORT = !!("placeholder" in document.createElement( "input" ));
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$.fn.placeholder = function() {
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return NATIVE_SUPPORT ? this : this.each(function() {
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var input = $(this);
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var placeholder = new Placeholder(input);
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placeholder.show(true);
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input.focus(function() {
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placeholder.hide();
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});
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input.blur(function() {
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placeholder.show(false);
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});
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// On page refresh, IE doesn't re-populate user input
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// until the window.onload event is fired.
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if ($.browser.msie) {
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$(window).load(function() {
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if(input.val()) {
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input.removeClass("placeholder");
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}
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placeholder.show(true);
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});
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// What's even worse, the text cursor disappears
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// when tabbing between text inputs, here's a fix
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input.focus(function() {
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if(this.value == "") {
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var range = this.createTextRange();
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range.collapse(true);
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range.moveStart('character', 0);
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range.select();
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}
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});
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}
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});
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}
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})(jQuery);
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